I think your best option is going with those minox 15x58's, they stopped making them, and nobody's been able to find them...and before they were selling for somewhere around 700 bucks so 550 is a great deal..i'm selling a brand new pair of brunton 15x51s for 300 obo. someone put up the cl post. they are pretty clear for a 15x51 but if you don't mind the extra 250, the minox are going to be a little more clear i'm sure...even if the optic quality was the same, the minox would be a bit more clear because you've got a 58mm objective and the bruntons have a 51...however the advantage to the bruntons are, they weigh alot less and are alot less bulky...
then again, yeah swaro's are obv gonna be better than any of these options...and yeah they are THAT much better, but its not a question of see deer or don't see deer..you just have to work harder without them