Cleaveland
I bought my tool kit the end of last year.
I called and talked to various suppliers and was more impressed with Cleaveland. I looked into buying the 'starter' kit vs the standard kit, and there wasn't much price difference, since there are only a few tools you'll need for wings and fuselage that you don't need for the emmpange kit. Being pretty sure that I'd continue building plus the second set of shipping costs I opted for the full kit.
I am putting the skins on my RV-7 now, and there is one or two instances when it would have been nice to have a tool that wasn't included in the kit. Right now countersinking the bolt for counter weights is the only thing I can thin of. 4 holes. On line there are ways to do this with out the dies, or you could borrow from local fellow RV builders.
I'm pretty familiar with tools, but rivets guns were beyond me. Between that and adding in my time researching it was easier to buy a whole kit.
The kit also comes with a great sheet metal training tool, that will get you to try different techniques. The two items that threw me a little, was the rivet tape was actually just a a particular variety of desk top scotch tape and an office tape dispenser. The other was the sharpies, I received black and would have preferred blue. I had a few tin snips, but still opted for the new ones included in the kit. I am using these and have actually had a few builders tell me that they use a variety of colors for marking, and in fact I had already started. The cost of these 2 items are probably very comparable to buying local.
I have had more than one builder remark that they were jealous of the quality of tools that I received vs the kits they had around the they started.
The other thing I learned talking to other builders, and the various suppliers is that the recommended tool list on Van's site is not necessarily up today.
No experience with the tool kits form other vendors, but I would recommend Cleaveland, If you decide you know exactly what tools they are talking about, Cleaveland can modify the kit to suit your needs, but thus far I am very happy that I ordered the full kit.
Good luck