...hm. call me stubborn, but i still like diy. for about $75 i've replaced everything from the tank to the cp3, with filters comprable to (if not better than) AD's and 3/8" lines the entire way. when i'm ready, i can add a mitusa to the system, or perhaps GDP's mechanical LP. Can't seem to find a mitusa price, but GDP's system looks to be on average 40 - 100 bucks more than and ADII. of course, adding just a raptor on there is 100 - 150 cheaper than an ADII...
so if you want biggest bang for your buck, diy lines and filter + raptor.
or biggest bang period, diy lines and filter + mechanical sender
hmm... or you could, i suppose, do ADII *AND* a mechanical sender, then your backup to the mechanical sender would be AD's electric one, which is better than the oe sender... but that seems overkill to me.
i think i'm starting to rant. hopefully something in there is useful for someone? =/