Sweet boy! He does have long legs & a longer muzzle so not to standard but very cute none the less. I actually think he'd fit in wonderful with your pack though looks wise. Definitely very complimentary to your girls.
He's very cute & reminds me a lot of Dixie Belle, in color & facial shape. She's got a big apple head noggin though still. I'm jealous his ears stand up all the way though, hers still don't & she's 13.5 weeks!
As for opinion on looks. Talking standard here. His muzzle will be longer, and he has a more rounded head. His front leg is the focal point of the picture so it makes it look longer than it is. You can see that his back legs are not considerably long. Being thin at 8 weeks will not give you any insight to his full grown build. He will probably be about 5 to 6 lbs. grown, and quite possible no taller than the average pet Chi that you see around the boards.