RE: why tamiya
All depends on where your priorities are. I own one Tamiya FO tank, and three of their 1:14 tractor-trailer kits with MFCU's, aluminum wheels, trailer light kits, etc. At least a few thousand bucks invested. I'm single, no dependants, good job, no debts, so I have some discretionary income. Regrets? Nope...not a chance! Some people think I'm nuts, but I love Tamiya quality.
If you can afford the price, buy Tamiya.