low rider panniers = lower center of gravity = increased stability and handling. it's a no brainer. as far as brands go, buy WATERPROOF panniers, not panniers that come with rain covers. they're just something extra to carry. i did a 5000 mile tour with nashbar panniers on my cannondale 1000 with 70 lbs. of gear.
even though they were well worn at the end of the trip, they never failed me. they kept my stuff dry, the stitching held up, and i never had a pannier bounce off the rack. and you can't beat the price. right now you can get a full set for less than $100. if money is not a concern and you want the very best panniers, check out ortliebs. they are waterproof, almost bombproof and will probably last you a lifetime.
b.s.98