Financially I could just pay for a 500 or 600 outright, however, your correct, If I could sell the 350, it would help reduce the cost. I've talked to a few people that have mentioned sometimes having two subs can be a bit tricky to get a good blend. Most likely I'll just get one or the other. I was even thinking about getting another 350. Two 350's might give the 500 or 600 a run, however, they would not go as LOW.