Careful when buying CRT for light gun games. I know you know that, but I'll mention it anyway.
I bought a 32" Sony CRT for my retro stuff, as it's the biggest CRT you can get before everyone started switching to LCD. Top of the range at the time (the speakers are absolutely beautiful, so clear and you now realise just how crap TV speakers now are), looks ace and works a treat.
Except it's 100hz.
I didn't even think to check if it was switchable, but it's not. None of the 32" stuff I've found is, so you have to drop down to 28" to get 50/60 switchable. All the other games look awesome in 100hz, but I now need to purchase another 28" TV just for Virtua Cop and HOTD!
/first world problems