What kind of top water and what size of baits? If you wanting something to throw frogs in the slop with, a medium really wont work well. If your looking to throw poppers and small jerk baits, your medium will work great. i
If I set myself a budget, I try and stay under it. That way, I can buy extra stuff like hooks, baits etc. Too stay under your budget and get a really good top water rod, give the Micro guide rods by Veritas a shot. I have the 7' Medium fast and that sucker is super super light. I would imagine that the 6'6" would even be lighter. Mine is super balanced with the Revo I have on it. I can throw just about anything with it. When it comes to throwing a small 1/4 Pop'R, it loads well, but is a bit to much rod for the bait. I switched to a glass 6'8" Medium/Medium fast for that, but for everything else, it works great.
You're new here so I will let you know about this guy LMG above me......The guy is an absolute nut about anything Abu Garcia. When you see him say anything about Shimano products, hes really just full of it