Of course I'm a gamer, isn't everyone here a gamer?? I sometimes print largish files to the printer (always over the network since I picked up the network printer). I only [currently] only have two computers that connect to the printer, but I have had more at times (up to five before I trimmed down).
There are times when I send a page to print, it leaves my system, and then sits in the printer for a while before coming out. By 'a while' I'm talking about several seconds longer than I would have expected.
As for your little HP printer... HP wasn't even a viable option when I was looking for a laser printer. I needed it to be network ready from the start and HP wanted at least $100 more for a similar model. Plus, the HP couldn't hold as much paper in it's tray at a single time, and the toner cartridges on the HP were no better in price (if anything more). So, I got a high resolution (1200x1200 max), networkable, full duplex (something not even available on the models from HP at ~$100 more than the Samsung), 500 sheet capacity in the included tray, printer.
Maybe more memory isn't the issue right now, but I'm sure there will come a time in the printer's life that I'll be sending larger documents to it and it would be nice to have. I don't want to not get the upgrade now (since it is so cheap) only to not be able to get it when I do really need it... Especially with the memory being about $50 for the 128MB. It's not like it uses standard computer sized memory either...