Freebase Dali

Yea, I mean... definitely do your initial tuning and find the zone (without paying much attention to the actual key it's in) that sustains smooth and clean, and yes, it would be a good idea to get a tuner to see what key it's in for future reference. That would definitely make it easier when you have to do maintenance tuning or when you re-skin the drums. Just remember to let the drum itself dictate what key/note you end up with and the kit will sound a lot better. Each drum piece is a specific size for a reason. They will naturally be the correct note for the kit if you tune them according to what we went over.

Another thing to consider is the situation the drums are going to be in... if they're going to be played live, at a show or something, you definitely want maximum sustain on your toms because it gets really drowned out in the rest of the band. If your toms are muffled excessively or not tuned correctly, they end up sounding like boxes.
Also, the biggest mistake I see people making when they tune their drums is when they only reference the sound the drum makes when they're sitting on them. The problem with that is most of the sound is coming straight up at you, and straight down through the resonant heads... while it sounds nice there, it sounds a lot different when you're a distance away from the kit and not subjected to those two positions. So having someone soundcheck the kit while you stand in different places is important. Having maximum sustain will ensure there's enough in places other than the 2 hotspots, even if it sounds like there's too much directly above and below the kit.
Obviously, if you're micing the kit, the best sound needs to come from wherever you're micing it, so keep all that in mind when you're tuning and you'll get the best results for the situation.