I own the Abu LTX and LTZ, aswell as the Shimano Aldebaran BFS and 2x Core 51's (One with the Avail ALD0936RR aka Honey comb). The LTX is pretty much a MGX with a micro spool and the LTZ is an upgraded LTX that comes with a micro spool and a super micro spool. The LTZ has a different braking system aswell. As for the Shimano's they are the way to go. The Aldebaran is the best choice for performance/price range. If you don't trust international retail webpages you can also make an Aldebaran BFS with a Core 50 + an Avail ALD0928R and Kattobi Air Bait Finesse special Bearings. Its all personal preference, but I like the Shimano's a lot more because they are a smaller profile.
http://www.hedgehog-studio.co.jp/product-list/12 is a great webpage to do some serious customizing to your baitcasters. (Gets expensive quick, but you can make some cool looking reels)
http://www.japantackle.com/ is also a good webpage to order JDM reels from.
You can also buy an Abu LT (same as the LTX, but without the carbon fiber handle) for like $220 American.
Edit:
You can also make a Chronarch 50 or Curado 50 series into a BFS reel aswell using the Hedge Hog studio webpage. But make sure you upgrade the braking system and bearings when your going micro spool for any reel. I prefer the Kattobi Air bearings over Boca's because they use micro ball bearings.