Hi
I did check out very many Reverb pedals when I bought mine, unfortunately cheaper usually means worse, it seems, when it comes to Reverb pedals.
If you want to run it in your effect loops, the Line6 Verbzilla is the best pedal out there IMO, closely followed by the more neutral Digitech Hardwire Reverb and the very "big" sounding EHX Cathedral. I have the Cathedral btw.
The Boss is IMO the best one among the cheaper options - maybe you can get one used on Ebay.
That yellow T-Rex falls a bit short IMO and isn't that much cheaper.