Quad Coil - your cloud blower, flavor is muted because there is so much airflow (My preferred range is 100-125w)
Triple Coil - Little less cloud, but more flavor as it's a bit denser (80-100w)
Sextuple Coil - Pretty much matched the Triple coil for me but was solid at a lower wattage (60-90w)
Dual Clapton - My favorite, treat it like a triple coil but I found it to be a little better flavor, but what I like best is the juice flow, you can drain more of the tank between refills (60-100w)
I haven't tried the new beast coils, the TC, or the high resistance coils, but those were my thoughts on those 4.
As for cheaper options, naw, the TFV4 is pretty much a stand alone coil. I've heard these fit though
http://www.zpaltech.com/products/coral Or the coils for that tank that is, but I don't know any of my "normal" vendors that carry them(read that as any vendors I've ever even heard of).