So I've been wanting to turn my amiga into a lean mean lightwave machine, and I realized I don't have very much disk space (200 mb drive), and my A2091 SCSI controller will only work with old-creaky drives under a gig (version 4 ROMs),
Its very easy to update the A2091 ROM. TJlaser (on this web site) sells these for a very reasonable few bucks out of the goodness of his heart. The newer ROM will allow comparatively huge hard drives, AND handle CDrom and removable media better. 4 Gig HDs are still available with plenty of life left in them. Upgrade while you can, everything is moving toward shorter supply! Sadly, Mechy's SCSI card reader is no longer made.

... it does have a parallel port, while my new computer is only equipped with usb to serial. So my question is it worth taking home for the parallel?
I would never want to be without at least one PC with true parallel and serial ports. There is always something that won't work through a USB dongle. A machine like you describe could be an adventure in itself trying alternate OSes, FreeDOS, Debian, Amithlon.
I've even heard of some people blowing their CIAs after using the laplink cable over a period of time...
It's my understanding that NEVER plugging or unplugging anything connected to an Amiga port (at either end of the cable!) while the Amiga is powered will preserve the CIAs indefinitely. I've never blown a CIA. OTOH, having a spare CIA is not a bad idea.
My 2 cents.