REPLACE statement removing commas from a money convert... I do NOT want it to do this

Question

I am using a case statement to remove the '-' from a negative number and place a '(' there instead. 
The negative side of the CASE statement is as follows:
REPLACE(CONVERT(varchar, CONVERT(money, SUM(Begin_Balance)), 1), '-', '(') + ')'
The positive side is:
CONVERT(varchar, CONVERT(money, SUM(Begin_Balance)), 1)
The data output for the positive portion is 100% correct. Here is an example of the output I receive.
(18271.15)
(25000.00)
82,490.00
45,000.00
Why is the replace statement stripping my commas?

Answer 1

>> I am using a case statement to remove the '-' from a negative number and place a '(' there instead. <<
So many horrible fundamental errors in one sentence! 
1.  CASE is an expression, not a statement. An expression returns a scalar value of a known data type, A statement changes the schema. 
2. In SQL, all display formatting is done in a presentation layer, never in the database.
3. We use the ANSI/ISO Standard  CAST()  and not the old Sybase/Unix CONVERT today
4. We use DECIMAL() and not the old Sybase/Unix MONEY. This thing does not work; it fail to do correct math; Google it! Do a data audit and see if you can go to jail for this. 
5. SQL is not COBOL. The COBOL language treats all data as strings. STOP DOING THAT IN SQL! This language uses abstraction in the database and the presentation does the job that your old PICTURE clause used to do. 
Can you get a 2-3 week intro course to SQL and modern programming form your company? 
--CELKO-- Books in Celko Series for Morgan-Kaufmann Publishing: Analytics and OLAP in SQL / Data and Databases: Concepts in Practice Data / Measurements and Standards in SQL SQL for Smarties / SQL Programming Style / SQL Puzzles and Answers / Thinking
in Sets / Trees and Hierarchies in SQL