The combo deal is really attractive (and sounds like you're already falling victim to the promo! [big grin] [tongue] [big grin]).
Even if I had the space and were thinking about a future side job (with an unknown timeframe), I would still not buy it now because I could buy second hand when I do need it. More importantly, I hate to see tools and accessories sit idle collecting dust for years.
If I were you, I'd get the combo, but not build a saw station to avoid function duplication. Use the time for building a saw station to build projects. Some users don't like the legs for the wings, but many assert that the set-up is rigid and solid. I only used the set-up once in a showroom (carpet floor), and am not an expert on that aspect.