Hey Dejacky, . . .!
Congratulations on your new Pacific kit, . .! It sounds like you got a great deal!!! well, your inconsistent sound problem, might be your head choicess. . .
You see, . . .because these drums are made of birch! (which is fantastic for recording, by the way) Birch shells usually have a very focused, and controlled sound, with a strong initial attack, and quick decay, . .and because of that, very focused attack, and quick decay-- which is one of the reasons that birch, supposedly make great 'recording' drums!
un-like maple, or a mixed shell wood-- which can be a very warm boomy sound-- with lots of overtones. . .Not that, maple wont sound great to record with as well-- some of the best recordings are dome with maple kits, Its just a different ,..more open sound.
so, you might want to try some single ply heads on the toms, . . .and maybe even on the snare--- or at least a 2 ply head on the snare, if you don't want to go that thin... You didn't mention what type of heads you are using, so I'm not sure if your having trouble with the toms, snare, bass, or all of them?
But, I have found that thinner heads on Birch work best! Now, your bass drum is difficult, . .so, you will have to experiment with that, . .cause you want your bass drum a little more open sounding, with slightly more overtones-- so, that's a tough one. . .
Also, its good to know that a lot of drummers, have had great success with using pinstripes on their toms, . .and even the Bass drum. But, I'm not too fond of the pinstripes on birch, because I think that they can 'choke' the toms too much, . . Maybe pinstripe on the bass, or even an Aquarian X. . . Like I said, the bass drum can be tough, your gonna have to experiment. .
But, let us know how you make out, and what heads you finally went with-- that worked for you. .. .
PS You might want to invest in a 'Drum Dial' ($59.). . .A lot of drummers think they are crap,.But, I think that they can be a handy tool-- I've been tuning drums for over 15 years, and I still use a drum dial-- just to get me in the right neighborhood of where I want the heads to be, . .then I fine tune them by ear. . .Cause your birch shells, should stay in tune for a while, before you need to mess with them again. . . Good luck!
. Wish I knew about this deal before..but guess it's okay since it gives Guitar Center people a reason to be nicer to me 
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. I'm starting to believe a 2ply head is really the way to go on this 22x18 bass drum...