Looks like its coming down to preference, is one more cost effective than the other?
Most are saying the DME is more $$ than LME. I've found that it, like which is better 'depends'. I've come accross less $$ for DME both per fermentable, and per pound. But you have to compare, and know that you are comparing at either 1.25 or .8 of the other (ie 1lb of LME=.8 DME for sugar and 1.25LME=1 of DME )
specifically 1.044 ppgp DME that is 1 lb of DME in 1 wort to 1 gallon = 1.044. With LME it 1.037.
DME is sticky when you add it from the steam. But LME is sticky all the time, and very viscous, but flows better when heated a bit.
About the only advantage of the DME over LME not mentioned is you can buy it more easily in 1, 2, 3 and even 5lb sizes. Most often, LME is sold in 3.3lb. So if you want 5lb of malt extract, you can mix 3.3lb of LME with 2lb of DME. Heck you can even store dme opened - usually for yeast starters, but not always. But if you buy preset kits, they send you the amount you need, so that isn't a problem either.
I've seen some kits at one of the IHBS that were DME and less $$ than the same kit as LME. so it all varrries, and you should do the math. But in general, I think the LME is less $$ than DME, unless you start buying 50lb bags of DME - you can by 33lb jugs of LME, but I'd be more concerned about it going bad once opened. I don't know the $/lb of either 50's or 33's. I've just seen them from time to time.
All this said, if I'm ordering big - like to get free shipping/reduced shipping per kit etc. I order LME if I'm making it soon, and DME if I plan on waiting a bit. So the first kit is a LME usually less $$ but the 2nd and 3rd are usually DME