Save your money and skip the Linx handheld for steps. The price tag is over $100, and its still a battery powered vac.
Get a Wintunnel T bagless cyclonic. I've heard excellent things about them. Use that as your bagless. Use the portable canister from the Platinum lightweight bagged upright package to use on the steps and that would save you the $100+ price tag of getting the Linx hand vac.
If you get a full size canister vacuum you can use the attachments on that for the steps. The Panasonic MC-CG902 canister has very large capacity bags, and are fairly economical in price. The upholstery nozzle is full sized with bristles. You could also find a Kenmore PowerMate Jr. new or used from numerous sources including eBay. Since the 902 is essentially the same machine as an older Kenmore Progressive, the hoses are the same and it will fit any powermate jr or most turbine powered nozzles on the market as well.
You could also look to bagless canister vacs. I have heard bad things about Hoover's Platinum bagless canister--hose power problems, but good thinks about the red and green standard cyclonic bagless line SH40050 & SH40055. These machines do come standard with a bare floor brush but the power nozzle fitting is a quick disconnect pedal with standard size round end on wand to fit most any friction fit bare floor brush if needed. The newer Windtunnel power nozzle on these machines is very nice.
[URL unfurl="true"]http://hoover.com/products/details/sh40055/windtunnel-multi-cyclonic-bagless-canister/[/URL]
