Jaguar, to clean install or not to clean install, that is the question!

I have gotten a refirbished Power Macintosh G3 Mini Tower 333mhz 128mb RAM, 8 GB HD, CD-ROM, Floppy, and Zip. I bought it from Mac of All Trades (www.macofalltrades.com) Which I highly recomend... Anywho... It came with Mac OS 8.6, I put 9.2.1 then 10.1.5 on it. Now I'm going to buy Jaguar soon. Should I do a clean install? I've read about problems when just plain old upgrading. Do you think I will have any? I hope not. Well I have 5 out of 8 GB left on my HD, and with Photoshop and all I WILL buy another HD (maybe 80, 100 or 120) By the way my HD is IDE. Any of you know where I can get killer deals on 80, 100, or 120 GB HDs? Well what should I do? Catchy title eh? 😉 🙄 😎 😀

OK...

Thanks... so when I get enough $ for a bigger, newer HD I'll do a clean install of Jaguar. If I leave OS 9 and OS Z (10.1.5) on the other HD will everything be ok, because I don't feel like erasing my entire HD...


EDIT: OS Z lol! Rather then correct my spelling I think I'll just leave it that way, lol, really everyone knows what I ment, right!?