I think your approach is flawed. If the only way your personal computer is useful to you is when you use pirated software, then you are not thinking straight. If using the software you mentioned is part of your job, then why do you need to bring it home? If bringing it home is also part of the job (ie, there is an expectation at work that you should be able to work at home too), then maybe your workplace vendor can be persuaded to give you (or even better, your employer) a nice deal on the price, even if the platform is different.
More importantly, there is a problem with your values here. Software Piracy is just a matter of ease. Would you steal anything else, if it were that easy? I know that others have given umpteen other analogies that may not fit the situation, but consider the coin-operated newspaper vending box outside any supermarket. You'd notice that once your friend puts in 50 cents and opens the box, you could very easily put your hand in and take a second newspaper for yourself when your friend picks up one. Saves you 50 cents! Would you do that? Most probably not, because it would be 'stealing', and it is 'only' 50 cents a day. Well then, if you buy Adobe Photoshop 7.0 for $300 odd, it works out to less than one dollar a day (assuming you throw it away after one year, which is never the case)! And I am talking full version, retail price; i am sure you could get the software for far less with all sorts of discounts, upgrades etc. Ebay might prove really cheap.
Okay, I not an idealist. You can always use pirated software to check out what the software does, but if you find it vital for your job / hobby, you should consider buying it. I am not a designer, and never would be, so would never need to use, hence buy, Macromedia Flash. But when my work wanted me to work on a Borland's C++ at home (ages ago), I insisted I be given legal software at home, and got it.
And yes, I too found it a pain to get software for the Mac that I already had for the PC, so I retained my laptop, using it for software that I have bought or my organization has provided (like MS Office, ER/Win, Visio, to name a few).
Do consider all that before opting for a pirated version.