I class $250-$400 (MSRP) as the high end tier personally. Above that is ultra-premium and/or super specialized. My own tiers would be <$50 (budget), $50-$125 (entry), $125-$250 mid-tier, and the rest above. You could shift the numbers a little bit, but using MSRP and how the reels are marketed/compared at the consumer level, that translates into:
cheapest possible for lowest cost consumer (budget)
solid reels with cost compromises (cheaper materials, mass produced features) to hit the price point (entry)
solid reels with fewer compromises and some high end features trickling down, usually from previous generations (mid-tier)
premium reels with no compromises designed to perform at the highest levels (high end)
Ultra premium reels with cutting edge materials, technology, or other features/design (ultra-premium)
Not every reel will have the match of price point, consumer target, and features. I think the Abu garcia Revo MGX at $350 is way overpriced. Aside from the size/weight, you can get a better reel in the STX at $219 MSRP. Actual paid price brings another consideration into the mix. Is a $200 MGX on clearance a better reel than a $189 STX on sale? How do those compare to a $225 used Chronarch MGL?
And all those questions are why we have a discussion forum here with a ga-gillion topics on "which reel" (which is good I think)?