I would take the deal. There's good advice about not getting more gear than what you need as a new OW diver, but then, a deal is a deal. There may be some initial pains in having to send the HOG to a remote location for service, but it certainly won't cost more than servicing a used APEKS that doesn't have a free parts warranty.
When I bought my two regs after OW, the 2nd was used for my wife for year, than becamse a spare. But I often found uses for it (loaning it to friends when in town, buds that forgot theirs, or sometimes let them use when with my tanks since I use DIN regs/tanks, they always Yoke). Perhaps I would send one off for service I'd use the other so I was never without a reg. Later used for doubles but the HOGS with 5th port route much better.
I later bought the APEKS XTX50/DST's for my dubs in the United States, Aqualung does not provide the 5th port adapter, and every tech I've talked to will not service a DST with 5th port since it's not standard issue (in the US, tho it is everywhere else). The HOGS are nearly identicle to the XTX50/DST's and have the 5th port. A service tech I know personally would service it, but not officially.
In the end, I have 8 1st and 2nd stage regulatars that I've almost completely switched over to HOG's (barring only two APEKS for shop uniform when I DM for them). This year I'll be able to service my own HOG's so it'll make it easy for me to deal with, easier than providing paperwork for every annual service on 6 other sets of regs just to save $35 per stage (which adds up on top of the $40-50 per stage service fees they charge).
HOG's are legitimate gear. They deal you are offered is excellent. I'd take it -- just remember, you can always find another use for the extra 2st stage later (or sell it).