okay....it really depends what sort of price you are looking for your new speakers? Vibe are a happy medium (and i use them) they sound fine and don't cost a fortune, but obv the more you spend...the more you get.
I wouldn't worry to much about magnet depth tbh....there is loads of room infront of the cone to space the speakers out as far as you need! i made up spacers from work...but a load of washers would do exactly the same job!
its a shame your a fair distance away....one morning and i could sort you out completely.....?
Give me a rough price what you want to spend on speakers and i'll point you in the right direction