Hey guys, great to see this thread still going strong! I should get this years seeds delivered today so will get them in the propagator soon.
I've opted for a basic cayenne chilli at about 50k SHU, it should go in most things and can be harvested red or green. Then I went for a Ring of Fire cayenne type chilli which is about 90k SHU and should be a good curry chilli when picked green.
Then to be a bit silly and keep the local Indians at the takeaway happy I'm going to try growing some Morouga Reds which I think are the current world record holders at 2,000,000 SHU. I grew some 1,500,000 Trinidad scorpions last season and they were uneatable even though when grown in non-ideal conditions the actual heat was probably half that. One lick of the inside and you'd think you had licked a halogen hob on full.
I also have some birds eye chillies from Sainsbury's. I might try drying out some of those seeds and growing them.