Hi SevenString! I have tried ESP E-ii standard horizon, and Jackson USA SL1, but my local shop does not have ESP USA. Shame to me, I used to think that ESP is made by Japanese only, and only recently I come to realize that there is ESP USA, which seems to be some really quality guitars. The price range of both guitars is pretty close to my budget, and it seems that the only noticeable difference is the neck construction, with ESP USA M-iii (bolt-on) and Jackson USA SL1 (neck-thru). I prefer a wide range of music, so the versatility of both guitars matches my needs. I have played guitars for some years, and I used to play on some budget guitars. This time, I made some money on my own, not my parents' money, and I want to purchase a guitar of my own, so I am pretty meticulous in the selection. I hugely appreciate any thoughts and share of experience on both guitars (ESP USA M-iii & Jackson USA Select SL1).