I think the only other confirmed AFV Club Stryker is the M1128 Mobile Gun System, although given the mileage they're getting out of their Centurion molds (3 down, at least 3 more to go), I wouldn't rule out anything. DML have been completely silent on just what they're going to be doing - probably trying to figure out a way to slide mold slat armor. I also wouldn't rule out Trumpeter, especially since they seem to be turning their Stryker kit into what it should have been in installments.
My primary concern - and in this I'm looking for feedback from others generally - is the current reliability of AEF. I notice his stuff can now be bought from places like Historica, and they actually seem to have stock. I swore off (and at) AEF a few years ago after a few direct orders that took months and arrived...uh, with signs of very poor QA (damaged pieces, missing pieces, fairly large pieces with fairly obvious cases of underpour (i.e. missing corners))
If AEF has changed its method of working and can be considered reliable, I'd be very interested in hearing about it. The impression I always got was that he was so hyper-productive in terms of new conversions, etc, that QA and the actual business side of the company in general were mostly ignored.
Never did got the missing pieces from that IDF PT-76B conversion...
Al