Reducer/Flatener Advice

I recently purchased a Tak FS102NSV and I'm looking for recommendations for a reducer/flat. I'd like to keep it under $400 if possible. Here's what I've seen - if anyone has tried these on your Tak let me know:

William Optics 2" .8x (P-F6A) $180
HoTech 2" SCA w/T-Thread for F/5-F8 (FF582) $160
TeleVue 0.8x for 800-1000mm refractor (RFL4087) $300
Others???

Thanks!