although I'm not very good at wood working, I do love power tools... heee hee....

My personal opinion is:
do not buy cordless tools if you are not using it frequently... I don't use my tools often, and when I need it, I do not plan ahead the night before and charge it first... I use it and then put it away... so, cordless tools might be a little more convinent when working (without a cord dangling in the back...) but as long as you remember to swing it aside and not try to cut the cord with the tool on the way, it is good enough... (a 50 ft extnesion cord will help... of coruse...)
the fact that it will always have power when plugged and do need to remember to charge is more important for me...
I'm currently building a cab myself.... and you'll need a drill... that is for drilling button/joystick holes, pre-drill screw holes, and also doubles as a power screw driver....
as for saw, I do have BOTH jigsaw and circular saw....
I found a jigsaw more useful in most times....
people said you cannot have straight cuts with jigsaws....
that is not true.... I spend an extra $15... I bought a 4 ft metal ruler and 2 clamps.... then I do my measurements.... then I put the ruler there and clamp it on the wood.... and use it as a guide to saw... and the jigsaw makes PERFECT cuts....
the ONLY time jigsaw cannot cut straight is when you try to cut some tiny bits along the side...... (like if you want to cut 1/4 out on the side...) cos the saw is too close to the edge and it might tilt and the cut is not perfectly square.... (that is the only time I have to use circular saw....)
and yes... I also has a dremel tool..... its been helpful so far... but it gets hot pretty quick.....so, I've been trying to avoid extended uses of it..... I have bought the bit to make the t-molding slot from dremel but has not done it yet....
I think the power drill and the jigsaw are useful and definitely worthwhile to have if you are handy.... dremel is more on some smaller projects....
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I'm not trying to be anal...... but I really do not like snaaake suggesting buying tools, finish project, and return.....
everyone has a budget to work on.... some is more lucky and has a bigger budget... some has less.... but that does not mean you can "cheat" like that...... if you really want to buy and turns out that it really doesn't work for you, of course, by all means return it.... but if you have no intention of keeping it from the beginning, go renting for less.... but don't be a jerk, buy it, use it and then return it....
I don't really want to say this, but snaaake has suggested this several times on different msgs... and it just bothers me, cos I think the people on this board are all nice helpful people and I would like the msgs / suggestions to show that we're also ethical..... sorry if I offended anyone....
(again... just my personal opinion....)