Hi Tortise,
I've stayed in GZ for last 2 yrs in Tian He district. GZ is a more down to earth place and not really unsafe. Juz be careful and speak more chinese so tat pp will not know u are not local.
For shopping, I would recommend Yide Road as David mentioned. Clothings at Guangzhou zhang Xi Road, Kai Rong Du clothing center (carry international brands) are much better than Baima which are more for local & korean brands. Always make it a point to go in the early morning as such places usually close by 5 - 6pm since they are selling wholesale. At night, then go over to Beijing Road, where u can find fake bags at the little alley called Tai Bai Leather City.
Roku is a good place for Jap food but in GZ, u really need to eat authentic canto food. I always like to have dim sum for Breakfast at Cai Yuan (Tian He District, Ti Yu Dong Road, Bai Fu Guang Cang 2nd floor) or Dao Xiang at Tian He Cheng, Dinner at Bing Sheng. U must drink their canto soup, its really super good. Any chinese restuarants serve tat.
Chinese Massage, if you want high class one, u can try Oriental Taipan, where they also have food provided, such as macau bun and cost around RMB 168? Or local ones will be around RMB50.
Hope u enjoy GZ.