Jet Trim is the best, but also the most costly. I've purchased a couple from Hydro Turf through PWC Muscle, plus you can get an additional 15% off with the code 'Hydro15'. Blacktip is comparable if not the exact same, decent color choices and combos with both.
The only difference is with HT you can have them leave the stupid raised emblem off, with Blacktip they refuse that request. I've tried... policy... You may not mind the emblem, but to me it catches the legs on any passenger riding. Yes you can remove it, but it leaves stitching holes behind.
Hydro Turf is fine, but I want a little better for the GSX next time, so I'm going with JetTrim.