Yo,
Nice to see another potential White Scar player. Few lessons from painful experience before. Before you start buying - practice!!!! And for what its worth - the Stormraven and some assault marines make BRILLIANT allies for White Scars.
Immediate observations are...
1. Don't take Khan, he's so unrelentingly awful. The standard bike captain build while tear him in half in combat, is cheaper and tougher. Captain, Artificer Armour, Power Fist, Bike = 175.
Combat Tactics is amazing on bikes, use it. Outflank is at best, ok, its not like your boys are slow! He has a power sword that is ap3 and will rarely kick off its
ID bonus. He's also only got a 3+ save. Oh and Fleet (wooooooo). Furious Charge is okay but you shouldn't be in combat much except vs tau and guard.
2. Your bike squads need a rethink. Either run them 5 men + 2 special weapons (of the same type) OR 8 men + Attack Bike to Combat Squad. As general experience meltas require you to get too close to a target, bikes are a bit 'meh' in combat (multi-meltas however...). Dual plasma or dual flamer with multi-melta attack bikes will get the job done. Power Lances a cute but you'll win the combats you'd win anyway without it and its not going to sway the ones you won't. Vanilla marine bikes are NOT close combat units.
3. Your points on the Teilon squad are off. You have to (and should) buy Teilon a camo cloak. But the 250 point sink that is Teilon, cloaks, missile launcher + quad cannon is very funny. 2+ cover and a bs6 krak missile can't be missed.
4. Fast Attack is the best and most characterful slot in the scars list. Your options are Multi-Melta attack bikes (amazing with the captain playing bullet catcher for them), Landspeeder Typhoons (trust me - you do not want to be in assault cannon range with a speeder, attack bikes are better multi-melta vehicles) and Stormtalons. Skyhammer missiles are cute but they're the worst of the three upgrades as they lack the str8+ for insta deathing things, or the AP3/2 and the range is relatively unimportant on a flyer.
5. There's a lot of love for thunderfire cannons in bike armies all of a sudden. I have no idea why. You get moderate anti-infantry firepower (not exactly something you lack with mobile, relentless, twin-linked bolters) that is very very easy to kill. By comparison, 115 buys you a vinidcator that immediately addresses a bike armies complete inability to deal with mass power armour spam.
Example:
Captain, Bike, Artificer Armour, Power Fist - 175
5 Bikes, 2 Flamers - 150
5 Bikes, 2 Flamers - 150
8 Bikes, 2 Plasma Guns, Attack Bike, Multi-Melta - 300
3 Attack Bikes, Multi-Meltas - 150
2 Landspeeder Typhoon - 180
Stormtalon Gunship, Typhoon Launcher - 155
Vindicator, Dozer Blade - 120
Vindicator, Dozer Blade - 120
=1500
Automatically Appended Next Post:
Terrain is such a bigissue now. 1/6 chance of needing to take a power armour save. Avoid going out of your way for it but don't worry unduly. Also, when (if!) assaulting, you only dangerous terrain test when assaulting over defence lines and barricades (I forget the exact phrasing) needless to say this surprises many people.
around 2500 points
600 points 
"I ayn't so eezy ta kill... heheheh..." 
BLOOD FOR THE BLOOD GOD!!!! 
2000 points
3000~ points