Originally posted by BrianR A thousand times this.
I'd just get the lenses and work on getting the most out of them on the k-30. They're both superb and capable of excellent image quality on pretty much any pentx dslr, even going back to the 'olden' 6mp days. Upgrade the camera later if you still feel the need.
I'll agree to this if you don't have extra cash, but I'll also say the K-3 (II) is a great camera and you won't be disappointed. Aside from cost, the biggest downside is the larger file sizes.
I'd suggest buying the lenses first and spending a few weeks with them on your K-30 before you upgrade to the K-3 (II). This will give you a direct comparison and you'll better understand the individual nuances and behaviors of the lenses and bodies rather than trying to adapt to both at the same time. If the lenses make you happy, you might even be happy sticking with your K-30 for a while longer while K-3 prices continue to fall.
FYI, some people that bought the K-3 weren't happy because they were pixel peeping, but 100% view of a 24 megapixel image will magnify any flaws or errors more than 100% view on previous 16 megapixel cameras, so don't fall into that trap!