Attackbikes

I thought I'd like to do something different from terminators for a little while, so this weekend I started to work on two attackbikes for one of my companies. Havent decided what company yet, but need to do this during the evening, as I plan to paint and glue the shoulderguards today.
I was thinking of 4th company, as I haven't got any troops in that company yet. According to the Codex Astartes the 2nd, 3rd, 4th and 5th battle company and 6th and 8th reserve company have bikes. I plan not to build too much of my second company yet, as there are so many 2nd company marines around on gaming tables and pictures. Would be nice to show off some other companies as well. Building a chapter I do need to make a 2nd company, but I will fill up some of the other companies first.
Reserve companies will be filled when the regular battle companies are up to battle strength. They don't have to be full, but I would like them to have at least half strength before I start on the reserrves. First things that will drop in to the reserve companies will probably be dreadnoughts for 9th company as I like to build and paint them.

After reading at http://www.lexicanum.com it seems like my bikes will end up in the 4th company. I will make them as two 10 man squads that can be split up in to 4 bikesquads. Two of these will have attackbikes. Then I will have more attackbikes (at least two attackbike squads) in the 6th or 8th company.

I have decided to put the Grey Knights on hold for a while. I have one Inquisitor, and he will be painted up when the time comes. But for the moment he will be alone, or he might find some use somewhere else.