Some guy on PBN is selling Egos with their parts swapped on PBN for 1050. It is a tad out of your price range but trust me, it's worth it. PM me if you want to contact him (I ordered from him and trust me, he is reliable). Of the four you mentioned though, I would go for the Proto. Order it from
www.thematrixcenter.com and they will install musashi programming on it for super cheap. Then you will have the fastest gun on the field
. (unless anyone else has a ramping board).