You probably want an LCD with LED backlighting. Not the best PQ, not the largest, but probably it will last your time frame without any maintenance.
BTW, there is a laser DLP on the market now, but the reviews panned it.
Front projectors have a rep for needing more frequent, and perhaps more expensive, lamp replacements. RPTVs might only need an easy to do lamp replacement every 6,000 hours or so, $250 or so. CRTs need more cleaning and maintenance. But if you're happy with 32" or less, maybe a direct view CRT from a reputable brand would also work, and last. But I doubt you'd put up with it for 7-10 years. You might be ahead to plan on a 5 year TV, especially if you pick a direct view CRT.
We could try to go over all the pros and cons here, but it's been done so much already. You'll get a feel for what YOU are comfortable with, and go with it, and be happy. There is a good selection out there. There is no one correct answer. All have their pluses and minuses, what counts is the one YOU feel has the best trade offs, not what I or anyone else prefers.
Eventually, we MIGHT settle down to a single technology again. But probably not. LCD is likely here to stay. If OLED comes out anything like is promised, it will likely be the big winner. But the technology is still evolving, and will for years. The Next Big Thing may be something we haven't even heard of.