Jamie, I'll go look at some model numbers for you. Frigidaire, in my opinion, should be avoided at all cost. That Precision Wash system (alternating spray levels for top rack & bottom rack) is the pits.
For Whirlpool the ones with the Dura Wash system are ok, but the capacity sucks because of the huge amount of rack space taken up in both racks for the funneled opening in the racks for the spray columns to get where it needs to go to do its work. This is actually the DU850 model. Actually anything with a Whirlpool DU8XXX is like this. The comparable Ropers also. The DU930 is just over $300 and uses the infamous PowerClean system. I noticed at Lowes has on their web site Whirlpool DU945 for $298.
Any low-end Kenmore is made by Frigidaire except for one $329 UltraWash dishwashr, made by Whirlpool & is PowerClean system based.
GE's GSD3200 & GSD3600 are good ones. I believe Per-O-Prince's household has the portable version of either of these and they are very pleased with them.
Hotpoint, has lesser-priced version of the GE models I mentioned above, but the lesser price is because of a less powerful pump and even less of a filtering/chopping sysetm.
Hope this helps