I went from a SS127 to an Old Town Bigwater 132PDL, for largely the same reasons. In my case, I did not want to go with a motor, I can actually get cardio from pedaling and it gives me hands free fishing.
I did not really consider the Bonafide P127 not because I had any issues or complaints about the SS127, but they donked up the execution of the P127. It's basically a Slayer Max 12.5" and didn't get the same thought out execution of the SS127 and PWR 129. At the time I bought my kayaks, the P127 was $500 more than the Sportsman 120 PDL and the Sportsman 120 will still probably win in a race. But the only feature of any potential value for me was the addition of rear tracks (which I have only used for my flag since I got my Bigwater). They tried to solve some issues by adding rod holders on the rails, however if you use the track mounts, the rod holders are no longer accessible. Additionally, those plastic edges are very sharp and I have no doubt will cut your line.
I ultimately went with the Bigwater 132 PDL because it was much faster than any other sit on top pedal fishing kayak that will hold me. I will note it is a bit easier to flip, but if you know not to learn you won't have any problems and it gives warning before it goes. My first day out, I got that warning maybe a few dozen times. Once I learned not to learn or how to lean against sharp turns, I never got to that warning point. I've been out on Lake Champlain with 30+ mph wind gusts and did not feel that warning point once.
I would recommend is first find out, do you want to go with a motor or pedals? If you go motorized, the SS127 is a great motorized candidate for that already and is still one of the best laid out kayaks on the market a few years later so you have a great candidate for that direction. If I go motorized, I would get a motor with spot lock, personally.
I will also note that the Sportsman 106 with the pedal drive in it still weighs more than the SSS127, although without the pedal drive, the 106 or even 120 is a little bit lighter.
One other thing I will note here. I haven't carried an anchor since getting pedals, but it's a bit of a learning curve to be able to jog yourself in place. Basically you want to point directly at or away from any current and pedal slowly enough to counter it and not move and you can hold a spot for 20+ minutes.
I posted this in another thread, but you can see my setup here. I have since added a mount with rod holders from Navarre Kayak on top of my pedal drive, which gives me a place to put up to two rods down which is very useful but I can't find any pictures since I got that, which was at the end of the year.
The front rails are from Pacific Yak Angler. Such a nice upgrade. Navarre Kayak fishing also makes some for the 106, 120 and 132, but Pacific Yak Angler makes the best rails for the 132.
In order to mount the fish finder on the Bigwater mounting plates, I had to buy solid mounting plates from Navarre Kayak fishing. The stock plates wobbled a lot and I didn't trust them.
I recommend getting a spare prop and sheer pins and keeping that in the kayak (I learned the hard way last summer when I dropped my prop in the water cleaning fishing line out of it).
Also if you go Old Town, the first thing I recommend is getting the rudder bolt from Navarre kayak. I also got the Navarre steering handle (I went short, it's more than tall enough). Basically with the rudder bolt, your rudder will stay in position without needing the annoying screw to tighten to hold position and loosen to change it, so you can simply not need the tension screw. The rudder bolt itself is $5 or $10 with all the washers you need.
I po