




Ill start by saying im jumping without yet reading any other replies, so im going to address your post and not what anyone else has stated.
Think of the difference between an 8" speaker and a 10" speaker, whether its a full range coax, HLCD or sub-woofer as if you were comparing a 1/2 ton pickup to a 3/4 ton pickup. That alone will account for some of the price difference. In terms of towing and load capacity, its not a fair comparison and you would not expect the 2 different model trucks to be the nearly the same cost.
No question that a larger speaker offers more mid-bass output and deeper mid-bass. The differences are just the same when talking about a 10" and a 12" woofer. Dont see many post from anyone saying no need to go with 12" woofer cause a 10" is just loud, deep, Hits just as hard, diggs just as deep, etc. So, an 8" HLCD is going to certainly be a step in the sound quality direction as compared to your current 6.5" and the difference between an 8" (anyones 8" HLCD) and a 10" HLCD is just another large step toward better sound quality, all while maintaining wake range projection.
Now getting a little technical. Two 8" drivers have a total surface area of a little more than a single pair of 10", but no quantity of smaller speaker will ever play deeper. So, I would seriously consider a single pair of 10" v's 2 pair of 8". Id say 9 of 10 Rev-10 owners are more than satisfied with a single air, then theres those that just want off the hook. So this gets your cost comparison WAY closer. Again, this is based on comparing surface are rather then the number of pods. Amp wattage wise, its also very close comparing a Syn-4 @ 400W rms x 2 and the 30.2 @ 420W rms x 2.
Price wise, if you apply the same 10% package discount the 2 xm9/30.2 cost is only $790 less than 2 pair Rev-10 w/TC3-S clamps and Suitz-10 and Syn-2 (comparable wattage wise). I think the performance difference between an 8" and 10" speaker has been covered.