Alternative to Case Expression

I have a query which has 2 levels to it, Matter level which is the highest level and Claimant level where there could be multiple to one Matter level (there is only ever one Matter level)

Here is a generic example

create table #tmp1 (
					Matter_Key INT NOT NULL
					,Matter_Number INT NOT NULL
					,Matter_Description Varchar(30) NOT NULL
					)
Create Table #tmp2 (
					Matter_Key INT NOT NULL
					,Claimant_Key INT NOT NULL
					,Claimant_Name Varchar(30) NULL
					,Descript Varchar(30) NULL
					,Amount Decimal(17,2)
					,Amount2 Decimal(17,2)
					)
INSERT INTO #tmp1 VALUES ('1','1234','Law Vs Company')
INSERT INTO #tmp1 VALUES ('2','2345','Toon Vs Company')

INSERT INTO #tmp2 VALUES ('1','1','Rob','Judgement',12.45,7.25)
INSERT INTO #tmp2 VALUES ('1','2','Mark','Other',300.00,50.00)
INSERT INTO #tmp2 VALUES ('1','3','Joel','Judgement',150.00,NULL)
INSERT INTO #tmp2 VALUES ('2','4','Hayley','Judgement',Null,15.00)
INSERT INTO #tmp2 VALUES ('2','5','Sofia','Report',75.00,NULL)
					

Select	mr.Matter_Number
		,mr.Matter_Description
		,Coalesce(CLA.CLAAmount,0) as Amount1
		,Coalesce(CLA.CLAAmount2,0) as Amount2
from #tmp1 as mr
LEFT JOIN (			Select	Matter_Key
							,Claimant_Name
							,SUM(Amount) as CLAAMOUNT
							,SUM(Amount2) as CLAAMOUNT2
					From #tmp2
				
					Group BY
					Matter_Key
					,Claimant_Name
					,Descript
					)CLA
					on mr.Matter_Key=CLA.Matter_Key


		
					
DROP TABLE #tmp1
DROP TABLE #tmp2

But I only want to see the value of Amount and Amount2 where Descript is Judgement but still see the same number of rows as the first query

So I used the following

Select	mr.Matter_Number
		,mr.Matter_Description
		,Coalesce(CLA.CLAAmount,0) as Amount1
		,Coalesce(CLA.CLAAmount2,0) as Amount2
from #tmp1 as mr
LEFT JOIN (			Select	Matter_Key
							,Claimant_Name
							,SUM(Amount) as CLAAMOUNT
							,SUM(Amount2) as CLAAMOUNT2
					From #tmp2
				WHERE Descript = 'Judgement'
					Group BY
					Matter_Key
					,Claimant_Name
					,Descript
					)CLA
					on mr.Matter_Key=CLA.Matter_Key

But this pretty much turns the left join into a inner join.

I have come up with the following to resolve it

Select	mr.Matter_Number
		,mr.Matter_Description
		,Coalesce(CLA.CLAAmount,0) as Amount1
		,Coalesce(CLA.CLAAmount2,0) as Amount2
from #tmp1 as mr
LEFT JOIN (			Select	Matter_Key
							,Claimant_Name
							,CASE WHEN Descript = 'Judgement' THEN SUM(Amount)
							ELSE NULL
							END as CLAAMOUNT
							,CASE WHEN Descript = 'Judgement' THEN SUM(Amount2) 
							ELSE NULL
							END as CLAAMOUNT2
					From #tmp2
					Group BY
					Matter_Key
					,Claimant_Name
					,Descript
					)CLA
					on mr.Matter_Key=CLA.Matter_Key

There are quite a few columns from #tmp2 that I need to sum like this so is there a better way to do it.

Regards