Hi Mark,
I have a billet Spike's Tactical 22 with a BAR rail, Catch-22 BHOA, MIAD grip and a magpul UBR stock en route and I have to say I can't wait for it to get here. I really like them and assuming I don't have any problems with the .22, I'll probably buy a .223 upper for it. I don't know if you've seen the build quality on the billet uppers and lowers, but I think they're stunning.
Having said that, the forged ST-22's are really nice as well and pretty reasonably priced if you ask me. Something you might want to consider for your .223/5.56 straight pull and .22 semi-auto choice, could be an LMT 223 SS (£1,700) with .22 conversion barrel and bolt (£400). If I hadn't set my heart on a ST-22, I probably would have bought one of these.
A .22 Glock would be lovely, but I don't fancy your chances because even with a .22 conversion kit, the barrel would still have to be 12" and I haven't seen anything like that before. If you find one though, let me know please!

I like the 1911, it's a classic design IMO.
Yeh I'm struggling with my 2 x .308/7.62 slots as well. I'm still toing and froing between an LMT LM7 or a Dolphin Gun AX308, although I'm pretty sure I want a 7.62x54R Mosin Nagant Sniper either way. I still need to check with my FEO if my 7.62 slot implicitly relates to 7.62x51 or not. I would have ordered the AX308 because it's stunning, but I'm not sure I'm ready to commit to a rifle where the barrel needs replacing every 2-3 years.
My shopping list changes on a daily basis, but as of just now, this is what I'd like to fill my cabinet with:-
Current Slots:
.22 Anschutz Match 54
.22 Spikes Tactical ST-22 *
.223 Saiga AK-10X or Spikes Tactical Upper
.303 SMLE * to be replaced with No 4 T 303 sniper at some point.
7.62x54R Mosin Pem Nagant 91/30 sniper
7.62/.308 Dolphin Gun Company AX308 or LMT LM7
Future Variations:
7.92x57 K98 Sniper
.44 Marlin Under Lever
.45 ACP LBP
* - Already ordered/received
Cheers,
Craig.