Take the Revo line.
Revo S has 3 bearings on the spool shaft, 1 on the crankshaft, and the roller (the 5 main bearings) along with 4 in the handle.
Revo SX has the same as the S, plus 2 on the levelwind
STX-same as SX. Titanium Nitride levelwind, everslik coated crankshaft and pawl, and the seperating spool thing (infini spool II) are the only differences in it and the SX.
Premier: only has 1 bearing on the levelwind, and no handle bearing. Yes, the $100 S technically has a "better" handle. I'm sure the premier's is to reduce weight though.
Revo Inshore: same setup and and design as the STX, with a stainless steel crankshaft, and all the bearings (instead of just the spool and roller) are HPCR bearings. No bearings in the handle though.
and considering that the 5 "key" bearings are the same in all the reels, and all the spool bearings are the HPCR bearings, all the models cast virtually the same (breakings systems aside).
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Looking at this and not thinking BOOM!!! is like trying to eat one Lay's potato chip