I do not own any SLR lenses so I can buy any of the two and will have to buy new lenses anyways.
I have a Nikon 5700 but am sick of its SLOW indoor focus speed..I have a 2 yr old and 1 yr old and most of the time I miss good shot cause the camera is trying to focus in low light(regular room lighting).
What do you guys suggest.

I have not used the Canon 10D, but I remember a review saying the Nikon has one of the best and intuitive user interfaces. I agree.

If you do get the Canon, I'd try hard to get the 20D instead of the 10D. I think it's a good step up.

10D users mentioned of some finicky auto focus but used prices for the 10D should make it really attractive. Have the 20D, but tried the D70 and it felt great in my hands.

Bigger question - which lens system do you want to use in the long run, Nikon or Canon. Can't go wrong with either one of them.

As odd as this may sound, I like the build quality and feel of the 20D/10D better than the D70. The only issue with the 10D is low light focusing, which apparently is already an issue for you. I don't know what the D70 is like in that respect, but when I was shopping for my D70/20D, that didn't seem to be an issue people were complaining about (dpreview.com). The 20D seems to do pretty well in low light. Having fast glass helps too. For indoor/available light, I will usually stick with f/1.4 prime lenses.

As far as lenses...I decided at some point that I would like the ability to buy and sell different used lenses. The canon "world" appears to be MUCH MUCH larger, so buying and selling Canon glass is pretty easy, as long as you're dealing with the higher quality pieces.

The only problem I guess is that used 10D prices are down to $750-ish, D70 prices are a little higher, and 20D prices are around $1300 (obviously, a LOT more). If low light photography is important, and you are on a budget, your decision may already be made by this point.

Also, if you decide you need to prioritize your budget, I would certainly take the less expensive D70 body. Spending big $$$ on a body is usually money down the toilet, because in two years, something better will come along for less money. Spending money on good glass, however, doesn't come with the same issues. You can buy a used piece of glass today for $1400, and in two years, you'll still see $1200 out of it, if you decide something else would better suite your needs.

No doubt photography forums are full of comparisons. This one doesn't touch on the D70, but it does offer some insights on the 20D vs 10D (and even the digital rebel aka 300D, which can be had for VERY cheap right now, esp. if you buy two qualifying lenses, where Canon will offer a triple rebate on the entire kit).<ul><li><a href="http://www.fredmiranda.com/forum/topic/155074/0">http://www.fredmiranda.com/forum/topic/155074/0</a</li></ul>

I love my D70, no complaints. The kit lense is really a pretty good one as well, and theres a rebate on nikonusa.com right now.