Repotting when a flower spike is forming?

[jood]

Hi,
I'm new to these forums but have been lurking for a while.

I bought my Phalaenopsis about a year ago and it was in flower at the time with one flower spike.

Since then it's grown 2 new leaves (with another one on the way) and seems to be sprouting a flower spike and/or some new roots. This is the first time I've managed to keep one alive long enough to flower again!

I've noticed that there's a lot of new root growth under the bark chips and I can see the tips of the roots starting to poke out of the drainage holes in the bottom of the pot.

I hope you can help me answer a few questions:

1. Do you think this sounds like I need to repot a size larger? I'm pretty sure I need to replace the medium anyway.

2. Is it ok to repot at this stage or am I likely to damage the plant?

3. Going by the photo, do you think I'm getting 1 or 2 flower spikes or are they both roots? Too soon to tell?

4. Are those brownish roots at the front dead and should I cut them off?

5. How long does it usually take for one of these spikes to flower?

Thanks in advance and sorry for all these questions!