What seeds do you recommend for my custom (short) box?

So, after getting my toes wet with a rubbermaid grow a year ago, I decided to do it right and built a custom grow box split 50/50 for veg/flower, completely from scratch. I'll upload some photos later when I get home. Each half is 20"w x 22"d x 48"h, and because it's custom I can place the holes and what not wherever I need to once I pick out my equipment. My original design was to be 52" high (max for the space) but the largest plywood was 4' x 8', so I saved a good bit of money by shortening it.

Seeing that I've only done CFLs before, I'm going to go with HID this time around. I'm interested in 'dro in the future, but I'll go with soil again (one step at a time, and I already have the basics for soil growing). Right now I'm thinking 250W HPS on one side and MH on the othe; I've seen some pretty nice results from others w/ 250W and judging by how I did w/ CFLs, I think I'll be able to pull it off. Do those bulb sizes sound reasonable?

I'm uncertain about the seeds however...I figure I've got 5" of clearance below the lights, plus the space for the light + air cooler + reflector, plus the space at the bottom for the pots. That leaves, what, 32" max? So I'm thinking I'll either do standard LST and top it, with SOG. I could go SCROG but I'd rather be invested in a handful at a time in case I screw one up.

What would do well in this space, given the properties I proposed above? Any specific brand+strain combo recommendations for this one? Luckily I'm only interested in growing indica or an indica mix.

Here's what I'm working with (photos, as promised):

https://www.rollitup.org/grow-room-design-setup/355014-custom-scratch-grow-cabinet-what.html

Id say do a test run let it run for a week or so and see how the enviorment is working out for you, it is going to get really hot and cramped in there. You want to go with something that is as indicia as you can get...you dont want something that is 'dominantly indicia' or whatever...you want pure indicia only hybrids or a pure indicia like hindu kush to be sure you dont end up with a sativa pheno.

Thanks for the tip deprave. I've grown in more cramped conditions before, and I'm not too concerned about my ability to keep the temperature within an acceptable range. I went with a cheaper strain (Nirvana Aurora Indica) so I can get an idea of how well this accommodates that sort, and I'll splurge when I'm confident that I know the case's limits. Keep in mind that, as shown in the pics, I haven't yet added any fans, etc because I first need to see how the lights fit and how hot they run.