Wiegela White Knight/Snowflake or Rose Iceberg.
 

I have a good spot in my small garden south of my house, full sun,
afternoon shade, and sheltered from north wind in zone 5. I want some
perenials or shrubs that is EASY to grow with showy flowers and long
bloom period. The space is about 2' wide and 3' tall.

I'd planned to plant a Iceberg Rose until I saw some Wiegela White
Knight and Snowflake on sale. I haven't seen any Wiegela live. I don't
know if they look OK. I never trust the photos on the web. Usually the
flowers photo on the web doesn't look anything close to the same
flower I have in my garden. It's like before and after pictures of a
plastic surgey ad.

Is Wiegela White Knight or Snowflake a good choice? Is Iceberg rose
better? Any others?

Thanks a thousand.