unlike some others, it seems, i'm not going to try to convince you that your concern for your bike is unwarranted.

here's what i would do, because i know that a truly ugly bike is not as likely to be stolen as one that is not.

1) always park, if possible, close to are more likely target of theft.

2) loose superficial dust and dirt, especially on tires and rims goes a long way towards discouraging theft.

3) keep a BFL (big, effing, lock) locked close to where you intend to park. and use it.

4) put on the oldest, rattiest saddle you can find and tolerate riding on. if the cover is split, so much the better.

5) as mentioned, take the front wheel, if practicable, with you.

6) be creative

as to your options:

1) i bought my well used, but otherwide very serviceable, '97 Tassahara for five dollars off of CL. the wheels were and extra 10. BTW, it is now SS and most of the Acera parts have worn out long ago. and i would not like to have it stolen either. so ya, that'll work.

2) see above...

3) that too .