UPS buying suggestion

[yudi v]

ok got  APC Smart-UPS SC 420VA
230V<http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=SC420I&total_watts=50&tab=models>
for
really cheap but this one only has a serial connection, and my server does
not have a serial port.

I  am thinking of getting a SUNIX SUN-UTS1009B UTS1009B USB to Port Serial
RS-232 Adapter <http://greenboxit.com.au/product_info.php?products_id=61491> >
did some research but not sure if this will work.

Or I can get a PCI card with a serial port.

Any suggestions.

Yudi