What to buy???

Greetings All!! My primary goal is getting through some often deep and fluffy stuff, up to 4+' at times to access a property I built at 10K'. Reliability is the next most important thing...which sleds are the most reliable?? Speed/performance are nice to have, but definitely secondary to reliability (I am mechanically inclined but don't want to be fixing up crap on the go!). Budget wise I was hoping to pick up two sleds for @10-15K combined. What say you experts?? Thanks in advance! Kyle