Hey miles;

yup, it's a very popular and broad niche. I'd say it depends on how much you know about the different types of packages out there.

Not all hosting packages are equal by a long shot and different packages suit different projects.

if you can narrow the niche down to a certain type of package that's suitable for specific projects then go for it.

eg, the BANS guys recommend hostgator as it runs well with their software. on the flip side, whilst HG are good you'd be sharing an IP with other webmasters - which has it's down side

Good luck
Austin.